JP2006299580A - Top slope slit embankment and upper slope slit towing method and upper slope slit bank construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof cover for an upper slope slit bank that can improve the safety of workers when constructing the upper slope slit bank.
An upper slope slit bank 10 to which a waterstop 20 according to the present invention is applied has at least an upper part of a wave receiving surface, and the slope has a plurality of intervals in the length direction. A slit 11 is formed, and a reclaimed water chamber 12 communicating with the plurality of slits and a compartment 13 for filling the filled sand 26 are formed therein, and the reclaimed water chamber and the partition are formed in a ceiling portion. An opening communicating with the chamber is formed. A plurality of slit lids 21 for closing the plurality of slits and a wave return plate 22 positioned at the upper end of the inclined surface over the length direction to prevent overtopping are integrated with a plurality of struts 23. It can be attached to and detached from the upper slope slit bank.
[Selection] Figure 1

Description

  The present invention relates to a water-stopper suitable for use in constructing an upper slope slit bank used mainly as a breakwater, a towing method for towing and transporting an upper slope slit bank to a construction site, and an upper slope slit It is related with the method of constructing in the construction place.

  Various types of caisson are provided for use as breakwaters and wave-dissipating blocks installed at relatively low depths in harbors, coasts, and oceans.

  FIG. 4 shows a caisson called an upper slope slit bank among various caissons. Briefly described, the caisson 40 may be made of reinforced concrete (RC) or hybrid of iron and concrete (HB). The caisson 40 has an inclined surface 41 near the top of the wave receiving surface, and a plurality of slits 41a are formed in the inclined surface 41 at intervals in the length direction. Inside the caisson 40, there are formed a water reserving chamber 42 communicating with the plurality of slits 41 a and a compartment 43 for filling the filling sand (filling material) 44. In order to fill the compartment 43 with the filling sand 44, the ceiling of the caisson 40 is opened.

  The construction work of the caisson 40 will be briefly described. The caisson 40 is carried to the installation location with the compartment 43 empty. Usually, a trolley is used for the transfer, and the installation at the installation location is carried out by hanging it with a crane or the like. At that time, the water reserving chamber 42 is installed so that it faces the sea side and the compartment 43 faces the land side, but the water depth is set so that at least about the upper half of the slit 41a comes out from the sea surface. When the caisson 40 is installed at the installation location, an operator enters the compartment 43 and the filling operation of the filling sand 44 is performed. When the filling operation is completed, the ceiling portion opening of the compartment 43 is closed with a concrete lid 45 (see, for example, Patent Document 1).

  However, the caisson 40 as described above has a problem that overtopping tends to occur during the filling operation of the filling sand 44 or the installation operation of the concrete lid 45, and the safety of the worker cannot be sufficiently secured.

Japanese Patent Publication No.55-40725

  The subject of this invention is aiming at the safety | security improvement at the time of upper slope slit bank construction.

  The specific subject of this invention is providing the water-stop cover for upper slope slit embankments which can implement | achieve a worker's safety improvement when constructing an upper slope slit embankment.

  Another specific problem of the present invention is to provide a floating towing method for towing and transporting an upper slope slit bank to a construction site in a floating state.

  Still another specific problem of the present invention is to provide a method for constructing an upper slope slit bank that can improve work efficiency when constructing an upper slope slit at a construction site.

  According to the present invention, there is a waterstop used for an upper slope slit bank, wherein the upper slope slit bank is at least an upper part of a wave receiving surface, and the slope is spaced in the length direction. A plurality of slits are formed, a recreational water chamber communicating with the plurality of slits and a compartment for filling the filling material are formed inside, and the recreational water chamber and the An opening communicating with the compartment is formed, and the water blocking lid is positioned over a plurality of slit lids for closing the plurality of slits and an upper end portion of the inclined surface to prevent overtopping. There is provided a waterstop for an upper slope slit embankment characterized in that the wave return plate is integrated with a plurality of struts and can be integrally attached to and detached from the upper slope slit embankment.

  According to the present invention, at least the upper part of the wave receiving surface is sloped, and a plurality of slits are formed in the slope at intervals in the length direction, and communicated with the plurality of slits inside. A reserving chamber and a compartment for filling the filling material are formed, and the upper slope slit bank is formed in a floating state in which an opening communicating with the reserving chamber and the compartment is formed in the ceiling. A towing method comprising a plurality of struts integrated with a plurality of slit lids for closing the plurality of slits and a wave return plate positioned at the upper end of the slope to prevent overtopping. There is provided a towing method for an upper slope slit embankment, wherein the waterstop is installed on the upper slope slit embankment and towed with the slope side facing the towing direction.

  Further, according to the present invention, at least the upper part of the wave receiving surface is inclined, and a plurality of slits are formed in the inclined surface at intervals in the length direction, and communicated with the plurality of slits inside. This is a construction method of an upper slope slit levee in which a reclaimed water chamber and a compartment for filling the filling material are formed, and an opening communicating with the reclaimed water chamber and the compartment is formed in the ceiling. A plurality of slit lids for closing the plurality of slits, and a water stop lid integrated with a plurality of struts, which are positioned at the upper end of the inclined surface over the length direction and prevent a wave return plate to prevent overtopping. A step of installing the upper slope slit bank, a step of sinking the upper slope slit bank having the water blocking lid into water having a depth shallower than the total height, and a step of filling the compartment with a filling material; Of the openings, A step of closing the opening in communication with the compartment even without, top bevel slit construction method of the bank, characterized in that said waterproofing cover to perform a step of removing from the top bevel slit crest in order is provided.

  According to invention of Claim 1 and 3, at the time of construction of an upper slope slit embankment, it is the state of the filling material to a compartment in the state which installed the water stop lid which integrated the some slit lid and the wave return board. By performing the filling operation and the operation of closing the opening after the completion of the filling operation, overtopping can be prevented to ensure the safety of the worker, and the work efficiency can be improved.

  According to the invention described in claim 2, by installing a water-stopping lid in which a plurality of slit lids and wave return plates are integrated on the upper slope slit bank, towing in a floating state, Even if the opening is not blocked, overtopping can be prevented and safe towing can be performed.

  With reference to FIGS. 1-3, the construction method of the upper slope slit bank (caisson) by this invention and embodiment of a water stop lid are demonstrated.

  FIG. 1 shows a state in which a waterstop 20 according to the present invention is installed on the upper slope slit bank 10 when the upper slope slit bank 10 is constructed. In the place where the upper slope slit bank 10 is installed, a mound 30 is usually built on the sea floor, and rubble (not shown) is spread on the mound 30. When the mound 30 is constructed, the height thereof is designed so that the upper side of the upper slope slit bank 10 comes out of the normal water surface WL. As shown in FIG. 1 (a), the upper slope slit bank 10 is installed on the mound 30 so that the wave receiving side faces the sea side and the opposite side faces the land side. The upper slope slit bank 10 may be used not as a breakwater but as a submerged bank.

  The upper slope slit bank 10 may be reinforced concrete (RC) or hybrid (HB) such as iron and concrete. The upper slope slit bank 10 has a slope on the upper side of the wave receiving surface, and a plurality of slits 11 are formed on the slope at intervals in the length direction. Inside the upper slope slit bank 10, there are formed a water reserving chamber 12 communicating with the plurality of slits 11 and a compartment 13 for filling the filling material. In particular, each of the water reserving chamber 12 and the compartment 13 is divided into a plurality of chambers in a state where they can communicate with each other via a reinforcing member such as a pierced wall. It may be a simple wall. In other words, as far as the compartment 13 is concerned, it is sufficient that each chamber has a structure capable of being filled with the filling material. In the ceiling portion of the upper slope slit bank 10, an opening communicating with the water reserving chamber 12 and the compartment 13 is formed. The upper slope slit bank 10 is also formed with openings 14 communicating with the water reserving chamber 12 at both end walls in the length direction. The upper slope slit bank 10 may further be provided with footings 15-1 and 15-2 on the wave receiving side and the lower edge on the opposite side.

  As shown in FIGS. 1A and 1B, the plurality of slits 11 in the upper slope slit bank 10 are closed by the slit lid 21 of the waterstop cover 20 according to the present invention, and the slope of the upper slope slit bank 10 is changed. A wave return plate 22 of the water blocking lid 20 is placed on the upper end. The openings 14 at both ends of the upper slope slit bank 10 are also closed with removable waterstops 25.

  Referring to FIG. 2, the water blocking lid 20 is formed by integrating a plurality of slit lids 21 for closing the plurality of slits 11 and a wave return plate 22 for preventing overtopping by a plurality of struts 23. The slope slit bank 10 can be integrally attached and detached. Here, both ends of the strut 23 are fixed to the attachment portions 21-1 and 22-1 provided on the slit lid 21 and the wave return plate 22, respectively, by bolts or the like, but may be fixed by welding or the like. In any case, the water blocking lid 20 is designed so that the wave return plate 22 is positioned at the upper end of the slope in the upper slope slit bank 10 with the slit lid 21 closing the slit 11. Needless to say, the wave return plate 22 and the struts 23 are also designed to have mechanical strength that can withstand the wave pressure expected when the upper slope slit bank 10 is constructed. The waterstops 20 and 25 are preferably made of a material that is durable against seawater, and a seal member such as rubber is provided to prevent water leakage into the water reserving chamber 12.

  The upper slope slit bank 10 is constructed as follows.

  (1) The upper slope slit bank 10 having the structure shown in FIG. 1 is manufactured on land different from the installation location.

  (2) The slit 11 and the opening 14 of the upper slope slit bank 10 are closed by the slit lid 21 and the water stop lid 25 of the water stop lid 20.

  (3) Float the upper slope slit bank 10 blocked by the waterstops 20 and 25 on the sea and tow to the installation location with a towed ship. The towed vessel is preferably equipped with a crane. The upper slope slit bank 10 can be floated on the sea surface because the inside is almost hollow. In addition, it goes without saying that the towing is performed by selecting a time when the waves are calm, and is performed so that the wave return plate 22 faces the towing direction. As a result, even if some waves come to the towing upper slope slit bank 10, overtopping is prevented by the wave return plate 22, and seawater does not flow into the upper slope slit bank 10 through the opening in the ceiling.

  (4) When the installation location is reached, seawater is poured into the compartment 13 while the direction is adjusted while the upper slope slit bank 10 is suspended with a crane or the like to sink.

  (5) When the upper slope slit bank 10 is completely submerged, filling the inside sand (filling material) 26 while draining the seawater in the compartment 13.

  (6) When the filling operation of the filling sand 26 is completed, the upper opening of the compartment 13 is closed with concrete. The upper opening of the compartment 13 may be closed with concrete, and the upper concrete 27 (FIG. 3) may be provided to provide functions such as securing the top edge and preventing overtopping when completed.

  (7) When the operation (6) is completed, the water stop lids 20 and 25 are removed.

  The above construction work is a case where the upper slope slit bank 10 is used as a breakwater. When the upper slope slit bank 10 is used as a submerged bank, the above operation is performed with the upper slope slit bank 10 suspended by a crane or the like at the time of low tide, and submerged after completion of the work.

  FIG. 3 shows a state where the construction work as a breakwater has been completed. In normal times, the slit 11 and the opening 14 are submerged in at most about half, and the front portion of the upper slope slit bank 10 having the slit 11 and the water reserving chamber 12 functions as a wave-dissipating block. In addition, in the filling operation of the filling material 26 and the operation of closing the opening, overtopping is prevented by the presence of the wave return plate 22 even if some waves come, so in the reclaimed water chamber 12, the compartment 13 and the ceiling portion The safety of workers who work is ensured. Thereby, since the worker can concentrate on the work, the work efficiency is also improved. In the upper slope slit embankment so far, the space below the water reserving chamber has not been filled with the filling material, but in this embodiment, the compartment 13 is also formed below the water reserving chamber 12. The inside-packed sand 26 is filled. Thereby, the stability with respect to wave force is ensured.

1 shows an upper slope slit bank to which a waterstop according to the present invention is applied. FIG. 1 (a) is a side view, FIG. 1 (b) is a plan view, and FIG. 1 (c) is a plan view of FIG. It is sectional drawing by line AA '. FIG. 2 shows an example of a water-stopper according to the present invention, FIG. 2 (a) is a partial front view thereof, and FIG. 2 (b) is a side view. FIG. 3 is a side view of the upper sloped slit bank after construction according to the present invention. FIG. 4 is a cutaway view of an example of a conventional upper slope slit bank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Upper slope slit bank 11 Slit 12 Reservoir chamber 13 Compartment 14 Opening 20, 25 Water stop lid 21 Slit lid 22 Wave return plate 23 Strut 26 Filled sand 27 Upper concrete 30 Mound

Claims (3)

A waterstop used for an upper slope slit bank, wherein the upper slope slit bank has at least an upper part of a wave receiving surface, and a plurality of slits spaced in the length direction on the slope. In the interior, a reserving water chamber communicating with the plurality of slits and a compartment for filling the filling material are formed, and an opening communicating with the reserving water chamber and the compartment is formed in the ceiling portion. Is formed,
The water stop lid is integrated with a plurality of struts, a plurality of slit lids for closing the plurality of slits, and a wave return plate positioned at the upper end of the inclined surface over the length direction to prevent overtopping. A waterstop for the upper slope slit bank, which is integrally removable with respect to the upper slope slit bank. At least the upper part of the wave receiving surface is formed into a slope, and a plurality of slits are formed in the slope at intervals in the length direction, and a reserving chamber and a filling material communicating with the plurality of slits are provided inside the slope. A method of towing the upper slope slit levee in which an opening communicating with the water reserving chamber and the compartment is formed in the ceiling portion in a floating state, and a compartment for filling is formed,
A water-stopping lid in which a plurality of slit lids for closing the plurality of slits and a wave return plate for preventing overtopping are positioned at the upper end of the inclined surface and integrated with a plurality of struts. A towing method for an upper slope slit bank, which is installed on a slope slit bank and tows the slope side in a towing direction. At least the upper part of the wave receiving surface is formed into a slope, and a plurality of slits are formed in the slope at intervals in the length direction, and a reserving chamber and a filling material communicating with the plurality of slits are provided inside the slope. A method for constructing an upper slope slit dyke in which a compartment for filling is formed and an opening communicating with the water reserving chamber and the compartment is formed in the ceiling,
A water-stopping lid in which a plurality of slit lids for closing the plurality of slits and a wave return plate for preventing overtopping are positioned at the upper end of the inclined surface and integrated with a plurality of struts. The process of installing on the slope slit bank,
Sinking the upper slope slit embankment with the water stop lid into water at a depth shallower than its total height;
Filling the compartment with a filling material;
A step of closing at least an opening communicating with the compartment among the openings;
A method for constructing an upper slope slit bank, comprising sequentially performing a step of removing the water blocking lid from the upper slope slit bank.

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